hello I am not sure about the preposition of the passive form of "replace"

Viral cultures have been replaced into genetic testsViral cultures have been replaced to genetic testsViral cultures have been replaced with genetic testsViral cultures have been replaced by genetic tests

My view is the first one. Thank youI came to the market from the womb; I bought a shroud, turned back to the tomb

Hello everyone, this week at work I encountered a friend twice who is not working with us anymore. In joke I tried to say "Doctor I am seeing you more than you worked here " I suppose this sentence is not completely correct. Can you help me make a better one? Thanks.I came to the market from the womb; I bought a shroud, turned back to the tomb